Bar Chart
This visualization displays the top 10 most populous countries using horizontal bars, with country names on the y-axis and population values on the x-axis. It is built with React and D3 v5, using `scaleBand` for the categorical y-axis and `scaleLinear` for the numeric x-axis, rendering as SVG. Population data comes from the United Nations World Population Prospects 2020, loaded via `d3.csv`, with tooltips showing formatted values. The chart includes styled axes and labels, with a teal fill for each bar.